One prison, one agent, one ultimate test of determination.

Trapped in the depths of Russia's most impenetrable fortress, Alex, a captured MI6 agent, clings to hope amidst the despair of his forgotten existence. As the clock ticks down on his survival, MI6 races against time to uncover his location and mount a daring rescue mission.

But he's an inmate who doesn't officially exist. And no one's ever escaped the Black Dolphin.

With the threat of discovery looming, will they reach him before it's too late?

Can they succeed in rescuing him, or will the Russian President's wrath seal his fate forever?

"Exciting, thrilling and totally unputdownable! Prepare yourself for an exhilarating insight into how the mega-rich ‘play’. This electrifying new release from renowned author Tim Heath will have you on the edge of your seat and begging for more!"

"Another totally original book from Tim."

"Have read mostly everything by Tim Heath and really enjoyed his latest! A great plot line with interesting twists and really well-developed characters. Highly recommended!"

"It's another great Tim Heath novel - full of mystery and international intrigue, twists and turns, and slow and fast pacing all of which leaves you wanting to read more. My only complaint about Tim's latest novel is that it ended! I couldn't put it down and can't wait to get my hands on the sequels to find out what happens next."